GDH · 1 day ago
Network Administrator
Alexandria, VA
Full-time
Hybrid
Senior Level, Lead/Staff
$40/hr - $45/hr
8+ years expGDH is seeking a Network Administrator to support critical classified networks. The role involves administering and maintaining network infrastructures, implementing security configurations, and collaborating with cybersecurity teams to ensure compliance with security standards.
ConsultingEmploymentStaffing Agency
No H1B
Security Clearance RequiredU.S. Citizen Only
Responsibilities
Administer and maintain complex NIPRNet and SIPRNet network infrastructures, including routers, switches, firewalls, TACLANEs, and related hardware, ensuring adherence to strict DoD and DISA security standards
Implement, enforce, and audit security configurations on network devices, servers, and endpoints in compliance with STIGs and Risk Management Framework (RMF) requirements to safeguard classified information
Review and analyze vulnerability scans (e.g., ACAS, SCAP), identify security gaps, and remediate vulnerabilities to maintain system accreditation and operational integrity
Develop comprehensive network documentation, including architecture diagrams, configuration baselines, and change management records to support efficient troubleshooting and audits
Support RMF lifecycle activities by preparing and updating accreditation artifacts such as System Security Plans, POA&Ms, and eMASS documentation
Monitor network performance and security alerts proactively, troubleshoot connectivity, authentication, and configuration issues within highly classified environments
Collaborate across cybersecurity teams, system engineers, and program managers to align network operations with evolving mission requirements and security policies
Participate in technical reviews, change control boards, and provide expert recommendations on network design, security enhancements, and process improvements
Stay current on emerging industry technologies, cybersecurity mandates, and best practices for classified network operations
Qualification
Required
Bachelor's degree in Computer Science, Information Technology, Engineering, or related field, or equivalent experience
Minimum of 8 years' progressive experience in network administration within federal agencies, with direct experience supporting classified networks
Active DoD Secret clearance is required; higher clearances are preferred
Current DoD 8570 IAT Level II certification (e.g., Security+, CySA+, CCNA Security, GSEC) or higher
Extensive hands-on experience with Cisco network hardware—including routers (39xx, 4xxx, 8K series), switches (29xx, 38xx, 9K series), and firewalls (55xx series and above)
At least 3 years of direct experience with TACLANEs (KG-175D/F/N/G) and GEM management consoles, including configuration and engineering build responsibilities
Deep understanding of DoD STIGs, RMF process, and DISA security standards
Proven leadership in network hardening, vulnerability management, and system accreditation workflows
Preferred
Experience working with military branches is highly valued
Knowledge of Cisco Identity Services Engine (ISE), DoD Zero Trust architecture, and Infoblox DNS solutions
Demonstrated expertise in designing redundant, resilient TACLANE network architectures with failover capabilities
Experience working directly with senior government leaders and military officials, demonstrating exceptional communication and professionalism
Strong problem-solving, interpersonal skills, and the ability to manage multiple priorities effectively
Benefits
Hybrid schedule
Company
GDH
GDH is consulting staffing firm that specializes in providing IT engineering-based candidates to commercial and government sectors.
501-1000 employees
Funding
Current Stage
Late StageLeadership Team
Blaine Caples
Chief Revenue Officer (CRO)
Recent News
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2025-10-22
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